Anaerobic Wastewater Treatment
Unit
Fluidized
Expanded
Rotating
Fixed filter
Contact
Sludge
filter
filter
filter
plant
blanket
plant
Filter medium, type
sand
sand
gravel
-
activated
gravel
plastics
stones
-
-
carbon
plastics
plastics
Filter medium, diameter
mm
0.2-1
0.3-2
100D-3000
-
-
Filter medium, disc
em
-
-
10-20
-
-
-
distance
Filter medium, rotating
rpm
-
-
2-5
-
-
speed
Filter medium, circumfemls
-
-
0.3
-
-
-
rential velocity
Filter medium, degree
%
100
100
75-100
100
-
-
of submersion
Porosity, void
%
-
-
-
5D-98
Porosity, with biomass
%
-
-
-
20-90
-
-
Specific surface
m 2 /m 3
200-600
20~00
100-200
6D-200
-
-
Height of tank
m
4-8
2-3
-
3-6
5-10
2-4
Radius of tank
m
3-4
2-3
-
(5-20)
(5-20)
(5-20)
Upflow water velocity,
mlh
4-8
1-5
-
-
-
0.01.Q.15
nominal
Recycle ratio
-
5-500
2-50
-
-
0.5-2
-
Sludge concentration,
kg 55Im 3
10-30
1D-40
5-15
5-15
3-10
5-20
tank
Sludge concentration,
kgVSSim 3
8-25
8-30
4-12
4-12
2-8
3-16
tank
Sludge concentration,
kgCODim 3
1D-30
10-40
5-15
5-15
3-10
5-20
tank
Sludge adhered to filter
~x. of total
95-100
7D-90
so-so
2o-so'
0
0
medium
80-90Sludge, suspended
%of total
0-5
1D-30
20-50
2o-so'
100
100
1D-20Sludge concentration,
g5Sim 3
20-100
2D-100
2D-300
2D-300
2D-100
2Q-100
effluent
Gas flux
Nm 3 l(m 2 ·d)
5-40
5-40
-
5-20
-
5-20
Gas flux, maximum
Nm 3 l(m 2 ·d)
3D-40
30-40
-
10-20
10-20
Energy, pumping, water
Whlm 3
15-30
1D-20
-
-
-
Energy, pumping, raw
Whlm 3
75-3000
20-1000
5-10
2D-40
lD-30
15-30
water
Energy for rotation
Whl(m 3 tank)
-
-
2o-BO
-
-
-
Energy for stirring
Whl(m 3 tank)
-
-
-
5-15
*upflow
**downflow
Table9.4
Technical data for anaerobic plants partly based on /1/, /2/, /3/, /4/, /5/, /11/, /12/.
Xs = 0.2 kg COD/m 3
Ccoo = 3.0 kg COD/m 3
The temperature of the plant is set at 35•c. From Table 9.3 we find the volumetric
load, Bv.coo = 3-10 kg COD/(m 3 ·d). Here we choose Bv,coo = 6 kg COD/(m 3 ·d).
From Expression (9.8), the volume, V2, of the anaerobic tank can be determined:
V2 = O, · Ccoo.1 /Bv.coo
(9.8)
The biodegradable COD concentration is 2.7 kg COD/m 3 as inert dissolved, s,, and
inert suspended COD, x~, must be deducted.
297
Unit
Fluidized
Expanded
Rotating
Fixed filter
Contact
Sludge
filter
filter
filter
plant
blanket
plant
Filter medium, type
sand
sand
gravel
-
activated
gravel
plastics
stones
-
-
carbon
plastics
plastics
Filter medium, diameter
mm
0.2-1
0.3-2
100D-3000
-
-
Filter medium, disc
em
-
-
10-20
-
-
-
distance
Filter medium, rotating
rpm
-
-
2-5
-
-
speed
Filter medium, circumfemls
-
-
0.3
-
-
-
rential velocity
Filter medium, degree
%
100
100
75-100
100
-
-
of submersion
Porosity, void
%
-
-
-
5D-98
Porosity, with biomass
%
-
-
-
20-90
-
-
Specific surface
m 2 /m 3
200-600
20~00
100-200
6D-200
-
-
Height of tank
m
4-8
2-3
-
3-6
5-10
2-4
Radius of tank
m
3-4
2-3
-
(5-20)
(5-20)
(5-20)
Upflow water velocity,
mlh
4-8
1-5
-
-
-
0.01.Q.15
nominal
Recycle ratio
-
5-500
2-50
-
-
0.5-2
-
Sludge concentration,
kg 55Im 3
10-30
1D-40
5-15
5-15
3-10
5-20
tank
Sludge concentration,
kgVSSim 3
8-25
8-30
4-12
4-12
2-8
3-16
tank
Sludge concentration,
kgCODim 3
1D-30
10-40
5-15
5-15
3-10
5-20
tank
Sludge adhered to filter
~x. of total
95-100
7D-90
so-so
2o-so'
0
0
medium
80-90Sludge, suspended
%of total
0-5
1D-30
20-50
2o-so'
100
100
1D-20Sludge concentration,
g5Sim 3
20-100
2D-100
2D-300
2D-300
2D-100
2Q-100
effluent
Gas flux
Nm 3 l(m 2 ·d)
5-40
5-40
-
5-20
-
5-20
Gas flux, maximum
Nm 3 l(m 2 ·d)
3D-40
30-40
-
10-20
10-20
Energy, pumping, water
Whlm 3
15-30
1D-20
-
-
-
Energy, pumping, raw
Whlm 3
75-3000
20-1000
5-10
2D-40
lD-30
15-30
water
Energy for rotation
Whl(m 3 tank)
-
-
2o-BO
-
-
-
Energy for stirring
Whl(m 3 tank)
-
-
-
5-15
*upflow
**downflow
Table9.4
Technical data for anaerobic plants partly based on /1/, /2/, /3/, /4/, /5/, /11/, /12/.
Xs = 0.2 kg COD/m 3
Ccoo = 3.0 kg COD/m 3
The temperature of the plant is set at 35•c. From Table 9.3 we find the volumetric
load, Bv.coo = 3-10 kg COD/(m 3 ·d). Here we choose Bv,coo = 6 kg COD/(m 3 ·d).
From Expression (9.8), the volume, V2, of the anaerobic tank can be determined:
V2 = O, · Ccoo.1 /Bv.coo
(9.8)
The biodegradable COD concentration is 2.7 kg COD/m 3 as inert dissolved, s,, and
inert suspended COD, x~, must be deducted.
297